Madonna has fired off a warning to "the word police" who will surely criticise her for the use of 'b**ch' in songs on the pop superstar's new Rebel Heart album, telling them to think twice before they take aim at her.

The love letter to Sia Shia Labeouf read from at the Grammy Awards in Los Angeles on Sunday night (08Feb15) as he introduced a performance of her hit Chandelier was actually a note written by the singer's husband.

Actresses Bette Midler and Julianne Moore are among the stars who have expressed their sorrow and heartbreak after gunmen shot and killed 12 staff members at French satirical magazine Charlie Hebdo on Wednesday (07Jan15).